Created by Jerry Wang on Jun 07, 2014

在browser里输入http url之后，
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敲回车之后http自动转换成https:
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通过httpwatch观察到有一个307 redirect:
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通过tcode SMICM 查看ICM server设置:
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发现server设置为所有http的request都会自动redirect成https, port number 44356:
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debug下面report能找到redirect具体的处理细节:

data(url) = 'http://<XXXX>:50056/sap/bc/srt/wsdl/flv_10002A111AD1/bndg_url/sap/bc/srt/rfc/sap/zweb_add_2/001/s1/b1?sap-client=001'.
data(content) = zcl_crm_cm_tool=>get_text_by_url( conv #( url ) ).

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get_text_by_url的方法实现如下:

  method GET_TEXT_BY_URL.
    DATA:lo_http_client           TYPE REF TO if_http_client,
         lv_status                TYPE i,
         lv_sysubrc               TYPE sysubrc.
    CALL METHOD cl_http_client=>create_by_url
      EXPORTING
        url                = iv_url
      IMPORTING
        client             = lo_http_client
      EXCEPTIONS
        argument_not_found = 1
        plugin_not_active  = 2
        internal_error     = 3
        OTHERS             = 4.
    ASSERT sy-subrc = 0.
    CALL METHOD lo_http_client->request->set_method( if_http_request=>co_request_method_get ).
*Disable pop-up when request receives unauthorized error: error 401.
    "lo_http_client->propertytype_logon_popup = if_http_client=>co_disabled.
*Send request.
    CALL METHOD lo_http_client->send
      EXCEPTIONS
        http_communication_failure = 1
        http_invalid_state         = 2
        http_processing_failed     = 3.
    ASSERT sy-subrc = 0.
* Get response.
    CALL METHOD lo_http_client->receive
      EXCEPTIONS
        http_communication_failure = 1
        http_invalid_state         = 2
        http_processing_failed     = 3.
   IF sy-subrc <> 0.
        CALL METHOD lo_http_client->get_last_error
        IMPORTING
          code    = lv_sysubrc
          message = DATA(ev_message).
        BREAK-POINT.
        RETURN.
   ENDIF.
   ev_text = lo_http_client->response->get_cdata( ).
   lo_http_client->close( ).
  endmethod.

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